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Questions tagged [attenuation]

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1 vote
0 answers
22 views

Determining the photon beam intensity to confirm the placment of an object in a iradiated chamber [closed]

A parallel bundle of monoenergetic photons is used for imaging in the configuration below. The bundle passes through a layer of water with a thickness of 1 cm, then through a zone where a cube with a ...
Ghidic Vladislav's user avatar
9 votes
4 answers
562 views

Getting the spectrum of light source at high intensity (for low transmittance measurement)

I am trying to measure the transmittance spectrum through a liquid sample using a visible-NIR spectroscopy (a spectrometer connected to a fiber optics and a collimating lens at the end), with tungsten-...
smk's user avatar
  • 93
0 votes
0 answers
68 views

Calculation of Ultrasonic Attenuation Coefficient

Hello I have a conceptual question regarding calculating the ultrasonic attenuation coefficient for a transmitted wave within a solid material. I have seen Beer's Law used to calculate the attenuation ...
iato's user avatar
  • 145
1 vote
1 answer
78 views

Beer's Law ultrasound attenuation, account for spherical spreading?

I've seen Beer's Law for narrow beam written as: $$ I = I_0 \cdot e^{-\alpha x} $$ ${\alpha }$ - attenuation coefficient (depends on absorption and scattering), $I_0$ - initial intensity, $I$ - ...
Carl Andren's user avatar